
/****************************************************************************
**
** Copyright (C) 2004-2008 VATATA.com . All rights reserved.
**
** This file is the part of the Miniutil Poject.
** Vatata's miniutil library is lightweight and portable (for linux
** and Windows). The C++ Class Library included Threadpool, Dll danymic loading, 
** General socket application model and tcp server, httpserver/servlet, etc. 
** It is a pratical utility disigned for who don't want learn the Big C++ 
** Developing Platform, such as  Boost or ACE.
**
** This file may be used under the terms of the GNU General Public
** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
** License if such license has been publicly approved by VATATA.com.
** (or its successors, if any) and the Miniutil Project Aministrators. 
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://www.gnu.org/licenses/lgpl.html. If you are unsure which 
** license is appropriate for your use, please review the following 
** information: http://code.google.com/p/miniutil/ or contact 
** http://www.vatata.com.
**
** In addition, as a special exception, VATATA.com, as the sole
** copyright holder for Miniutil Project, grants users of VATATA
** P2P Platform the right to release and package with the related 
** libraries without the source code.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. vatata reserves all rights not expressly
** granted herein.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/


#ifndef _MINIUTIL_INSTANCEGARBAGE_H__
#define _MINIUTIL_INSTANCEGARBAGE_H__


#include <vector>
#include "miniutil/thread.h"

namespace miniutil
{
	template <typename CLSNAME>
	class instancegarbage:public thread
	{
		public:

			static instancegarbage<CLSNAME>* getinstance()
			{
				static instancegarbage<CLSNAME>* pgarbage = NULL;
				if(pgarbage == NULL)
				{	
					pgarbage = new instancegarbage<CLSNAME>();
					pgarbage->start();
				}
				return pgarbage;
			}

			static void addinstance(CLSNAME* pinst)
			{
				instancegarbage<CLSNAME>::getinstance()->addinstance_a(pinst);
			}

			static int getinstancenum()
			{
				return instancegarbage<CLSNAME>::getinstance()->getinstancenum_a();
			}
			
			
			virtual void run()
			{
				std::vector<void*>::iterator itercls;
				while(true)
				{
					minsmtx.lock();
					for(itercls = mvinstances.begin(); itercls != mvinstances.end();)
					{
						CLSNAME* pinstance = (CLSNAME*)(*itercls);
						if(pinstance->cansafedelete())
						{
							delete pinstance;
							itercls = mvinstances.erase(itercls);
						}
						else
							itercls ++;
					}
					minsmtx.unlock();
					miniutil::thread::sleep(1000);
				}				
			}
		protected:
			instancegarbage(){}
			void addinstance_a(CLSNAME* pinst)
			{
				minsmtx.lock();
				mvinstances.push_back(pinst);
				minsmtx.unlock();
			}
			int getinstancenum_a()
			{
				int ret;
				minsmtx.lock();
				ret = (int)mvinstances.size();
				minsmtx.unlock();
				return ret;
			}

		private:
			miniutil::mutex minsmtx;
			std::vector<void*> mvinstances;
	};
}

#endif
